CLOSE LOOP CONTROL SYSTEMAND

STATION C&I DDCMIS

DDCMIS SYSTEM

Process I/O Level

Process Control Level

Management Level

DRIVES

MEASURING

INSTRUMENTS

OTHERPROCESS

INSRUMENTATION IN POWER PLANT

• Temperature - T/C & RTD

• Pressure

• Level - DP / Displacement / Hydra Step Drum Level Indicator

• Flow - DP / Annubar / Mag-flow

• Turbine Supervisory - Vibration/ Expansion/ Axial Shift/ Eccentricity

• Steam & Water Analysers - Conductivity/ pH/ DO2/ Silica

• Gas Analysers - O2/ CO2/ CO (in Flue Gas) Pollution Monitor H2 Purity (in Generator)

INSTRUMENTS TO DDCMIS

Control Network(INFI-NET)

Harmony Consoles

H-Net

Bridge Controller

Bridge Controller PBAs

Harmony IOR

Gateway S800 I/O

Cluster Modem

Optical ModulebusModulebus Repeater

M1

M2

X1

X2

Chan A

Chan B

BB

AA

M1

M2BA

S800 I/OCluster Modem

Harmony Engineering

Tools

DDCMIS OPTIONS

PLANT TO MANAGEMENT CONNECTIVITY

DDCMIS OPTIONS

CONTROL SYSTEM

IntroductionSystem – An interconnection of elements and devices for a desired purpose.

Control System – An interconnection of components forming a system configuration that will provide a desired response.

Process – The device, plant, or system under control. The input and output relationship represents the cause-and-effect relationship of the process.

Introduction

Multivariable Control System

Open-Loop Control Systems utilize a controller or control actuator to obtain the desired response.

Closed-Loop Control Systems utilizes feedback to compare the actual output to the desired output response.

EXAMPLE:- PROCESS CONTROL

Water-level float regulator

Examples of Modern Control Systems

Examples of Modern Control Systems

POWER PLANT PROCESS CONTROLCOORINATED MASTER CONTROLAIR AND FUEL FLOW CONTROLDRUM LEVEL/FEED WATER CONTROLSH/RH TEMPERATURE CONTROLFURNACE DRAFT CONTROLHEATER LEVEL CONTROLMILL AIR AND TEMPERATURE CONTROLPA HEADER PRESSURE CONTROL

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